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liquor_n as_o spirit_n of_o wine_n make_v the_o subsidence_n of_o the_o liquor_n be_v indeed_o a_o good_a sign_n that_o the_o receiver_n be_v well_o exhaust_v but_o give_v we_o not_o a_o account_n what_o quantity_n of_o air_n may_v be_v in_o the_o receiver_n till_o it_o be_v arrive_v at_o that_o great_a measure_n of_o rarefaction_n and_o the_o same_o liquor_n be_v upon_o a_o very_a small_a leak_n such_o as_o will_v not_o be_v prejudicial_a to_o many_o experiment_n impel_v up_o to_o the_o top_n of_o the_o gage_n we_o can_v afterward_o by_o this_o instrument_n take_v any_o measure_n of_o the_o air_n that_o get_v in_o at_o the_o leak_n but_o now_o there_o be_v divers_a experiment_n where_o i_o desire_v to_o see_v the_o phaenomena_n that_o will_v happen_v not_o only_o or_o perhaps_o not_o at_o all_o upon_o the_o uttermost_a exhaustion_n of_o the_o air_n but_o when_o the_o pressure_n of_o it_o be_v withdraw_v to_o such_o or_o such_o a_o measure_n and_o also_o when_o the_o air_n be_v gradual_o readmit_v to_o make_v the_o gage_n we_o be_v speak_v of_o take_v a_o very_a slender_a and_o cylindrical_a pipe_n of_o glass_n of_o 6_o 8_o 10_o or_o more_o inch_n in_o length_n and_o not_o so_o big_a as_o a_o goose-quill_n the_fw-fr but_o such_o as_o we_o employ_v for_o the_o stem_n of_o seal_a wether_n glass_n and_o have_v at_o the_o flame_n of_o a_o lamp_n melt_v it_o but_o not_o too_o near_o the_o middle_n to_o make_v of_o it_o by_o bend_v it_o a_o siphon_n who_o two_o leg_n be_v to_o be_v not_o only_o parallel_v to_o one_o another_o but_o as_o little_a distant_a any_o where_o from_o one_o another_o as_o convenient_o may_v be_v in_o one_o which_o be_v usual_o the_o long_o of_o these_o leg_n there_o be_v to_o be_v leave_v at_o the_o top_n either_o half_a a_o inch_n or_o a_o whole_a inch_n or_o more_o or_o less_o than_o either_o according_a to_o the_o length_n of_o the_o gage_n or_o the_o scope_n of_o the_o experimenter_n of_o air_n in_o its_o natural_a state_n neither_o 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be_v to_o be_v very_o diligent_o pump_v out_o and_o then_o notice_n be_v to_o be_v take_v to_o what_o part_n of_o the_o gage_n the_o mercury_n be_v depress_v that_o we_o may_v know_v when_o we_o shall_v afterward_o see_v the_o mercury_n drive_v so_o far_o that_o the_o receiver_n the_o gage_n be_v place_v in_o be_v well_o exhaust_v and_o if_o it_o be_v much_o desire_v to_o know_v more_o accurate_o for_o one_o may_v arrive_v pretty_a near_o the_o truth_n by_o guess_n what_o station_n of_o the_o mercury_n in_o the_o gage_n be_v answerable_a to_o the_o degree_n of_o the_o rarefaction_n of_o the_o air_n in_o the_o receiver_n that_o may_v be_v compass_v either_o by_o calculation_n which_o be_v not_o so_o easy_a
instrument_n as_o a_o baroscope_n you_o need_v but_o heat_n a_o pin_n or_o slender_a wire_n red_a hot_a and_o so_o burn_v a_o hole_n through_o the_o stoppel_n and_o this_o expedient_a which_o i_o can_v not_o convenient_o advertise_v your_o lordship_n of_o soon_o may_v be_v of_o use_v when_o a_o travail_a baroscope_n be_v to_o be_v often_o remove_v because_o have_v once_o stop_v the_o whole_a orifice_n well_o it_o be_v far_o more_o easy_a to_o stop_v and_o open_v a_o pin-hole_n accurate_o than_o to_o close_v and_o unstop_v the_o whole_a orifice_n of_o the_o tube_n note_v i_o endeavour_v to_o confirm_v more_o than_o one_o of_o the_o forego_n particular_n by_o this_o one_o experiment_n have_v cause_v a_o portable_a barometer_n to_o be_v make_v with_o the_o short_a leg_n of_o a_o somewhat_o more_o than_o ordinary_a length_n i_o afterward_o cause_v the_o upper_a part_n of_o this_o leg_n to_o be_v draw_v out_o very_o slender_a as_o in_o this_o 25_o the_o experiment_n and_o last_o i_o cause_v the_o same_o short_a leg_n to_o be_v either_o about_o or_o somewhat_o above_o the_o middle_a bend_a downward_o so_o that_o the_o small_a orifice_n of_o the_o slender_a apex_n point_v towards_o the_o ground_n this_o do_v i_o be_v to_o have_v measure_v the_o height_n of_o the_o suspend_v mercury_n but_o not_o have_v a_o fit_a ruler_n at_o hand_n i_o then_o defer_v and_o afterward_o forget_v to_o do_v it_o but_o i_o remember_v that_o neither_o i_o nor_o some_o other_o verse_v in_o such_o experiment_n to_o who_o i_o show_v it_o take_v any_o notice_n that_o the_o mercury_n be_v less_o high_a than_o in_o ordinary_a barometer_n whence_o it_o be_v conclude_v that_o the_o atmosphere_n can_v exercise_v his_o pressure_n not_o only_o at_o a_o very_a small_a orifice_n which_o in_o our_o experiment_n do_v little_a if_o at_o all_o exceed_v a_o pin-hole_n but_o when_o the_o air_n must_v at_o this_o little_a orifice_n press_v upward_o to_o be_v able_a to_o press_v upon_o the_o surface_n of_o the_o stagnant_a mercury_n experiment_n xxvi_o about_o the_o make_n of_o a_o baroscope_n but_o of_o little_a practical_a use_n that_o serve_v but_o at_o certain_a time_n to_o show_v some_o ingenious_a man_n by_o a_o medium_fw-la that_o have_v not_o hitherto_o that_o i_o know_v of_o be_v make_v use_n of_o that_o the_o not_o subside_v of_o quicksilver_n in_o a_o invert_v tube_n that_o be_v a_o little_o short_a than_o 30_o inch_n or_o thereabouts_o do_v not_o proceed_v from_o such_o a_o fuga_fw-la vacui_fw-la as_o the_o school_n ascribe_v to_o nature_n but_o from_o the_o gravity_n of_o the_o external_a air_n i_o devise_v the_o follow_a experiment_n have_v make_v choice_n of_o a_o time_n when_o it_o appear_v by_o a_o good_a baroscope_n which_o i_o have_v frequent_o consult_v for_o that_o purpose_n that_o the_o atmosphere_n be_v considerable_o heavy_a i_o cause_v galspipe_n hermetical_o seal_v at_o one_o end_n and_o in_o length_n about_o 2_o foot_n and_o a_o half_a to_o be_v fill_v with_o quicksilver_n save_o a_o very_a little_a wherein_o some_o drop_n of_o water_n be_v put_v that_o we_o may_v the_o better_o discern_v the_o bubble_n if_o any_o shall_v be_v leave_v after_o the_o inversion_n of_o the_o tube_n into_o a_o open_a glass_n with_o stagnant_a mercury_n in_o it_o have_v by_o this_o mean_n though_o not_o without_o difficulty_n free_v the_o tube_n from_o bubble_n we_o so_o order_v the_o matter_n that_o the_o quicksilver_n and_o the_o little_a water_n that_o be_v about_o it_o fill_v the_o tube_n exact_o without_o leave_v any_o interval_n that_o we_o can_v discern_v at_o the_o top_n and_o yet_o the_o mercurial_a cylinder_n be_v but_o very_o little_o high_o than_o that_o of_o our_o baroscope_n be_v at_o that_o time_n this_o do_v the_o new_o fill_v pipe_n be_v leave_v erect_v in_o a_o quiet_a place_n where_o the_o liquor_n retain_v their_o former_a height_n for_o divers_a day_n but_o though_o a_o ordinary_a school-philosopher_n will_v confident_o have_v attribute_v this_o sustation_n of_o so_o heavy_a a_o body_n to_o nature_n fear_n of_o admit_v a_o vacuum_n yet_o it_o seem_v that_o either_o she_o be_v not_o always_o equal_o subject_a to_o that_o fear_n or_o some_o other_o cause_n of_o the_o phaenomenon_n must_v be_v assign_v for_o when_o a_o pretty_a while_n after_o i_o have_v observe_v by_o the_o baroscope_n that_o the_o atmosphere_n be_v grow_v much_o light_a than_o before_o repair_v to_o my_o short_a tube_n i_o find_v that_o according_a to_o my_o expectation_n the_o quicksilver_n be_v not_o inconsiderable_o subside_v and_o have_v leave_v a_o cavity_n at_o the_o top_n which_o afterward_o grow_v lesser_a according_a as_o the_o atmosphere_n grow_v heavy_a nb._n 1_o the_o tube_n employ_v about_o this_o experiment_n may_v be_v bring_v to_o the_o requisite_a shortness_n either_o by_o wear_v off_o a_o little_a of_o the_o glass_n at_o the_o orifice_n of_o it_o or_o by_o increase_v the_o height_n of_o the_o stagnant_a mercury_n into_o which_o it_o have_v be_v invert_v 2._o when_o the_o quick_a silver_n in_o our_o short_a tube_n be_v much_o subside_v there_o appear_v in_o the_o water_n that_o swim_v upon_o it_o a_o little_a bubble_n about_o the_o bigness_n of_o a_o small_a pin_n head_n but_z consider_v how_o careful_a we_o have_v be_v to_o free_v the_o tube_n from_o bubble_n before_o we_o set_v it_o to_o rest_n it_o may_v very_o well_o be_v that_o this_o so_o small_a a_o bubble_n be_v not_o produce_v till_o after_o the_o subside_v of_o the_o quicksilver_n whereupon_o the_o aerial_a particle_n in_o the_o water_n become_v less_o compress_v than_o before_o not_o to_o mention_v that_o the_o bubble_n such_o as_o it_o be_v appear_v very_o much_o great_a than_o it_o will_v have_v do_v if_o the_o pressure_n of_o the_o atmosphere_n have_v not_o be_v keep_v from_o it_o by_o the_o weight_n of_o the_o subjacent_a pillar_n of_o mercury_n experiment_n xxvii_o about_o the_o ascension_n of_o liquor_n in_o very_o slender_a pipe_n in_o a_o exhaust_v receiver_n what_o i_o relate_v to_o your_o lordship_n in_o the_o 35_o the_o of_o the_o publish_v experiment_n pag._n 138._o about_o the_o seem_o spontaneous_a ascension_n of_o water_n in_o slender_a pipe_n have_v occasion_v the_o make_n of_o many_o trial_n by_o the_o curious_a whereby_o that_o experiment_n have_v be_v not_o a_o little_a diversify_v but_o because_o among_o those_o i_o have_v yet_o hear_v of_o none_o have_v be_v make_v in_o our_o engine_n it_o may_v not_o be_v amiss_o to_o add_v the_o follow_a trial_n which_o may_v be_v of_o use_n in_o the_o examen_fw-la of_o one_o or_o two_o of_o the_o chief_a conjecture_n that_o have_v hitherto_o be_v propose_v about_o the_o cause_n of_o that_o odd_a phaenomenon_fw-mi we_o tinge_v some_o spirit_n of_o wine_n with_o cocheneel_v which_o be_v put_v into_o the_o receiver_n and_o the_o air_n withdraw_v do_v exceed_o bubble_v for_o a_o pretty_a while_n then_o little_a hollow_a pipe_n of_o differ_v size_n be_v put_v into_o it_o the_o red_a liquor_n ascend_v high_a in_o the_o slendere_a than_o the_o other_o but_o upon_o the_o withdraw_n of_o the_o air_n there_o scarce_o appear_v any_o sensible_a difference_n in_o the_o height_n of_o the_o liquor_n nor_o yet_o upon_o the_o let_v it_o in_o again_o afterward_o two_o such_o pipe_n of_o differ_v size_n be_v fasten_v together_o at_o a_o distance_n with_o cement_n be_v let_v down_o into_o the_o same_o spirit_n of_o wine_n when_o the_o receiver_n be_v well_o exhaust_v notwithstanding_o which_o the_o liquor_n ascend_v in_o they_o for_o aught_o we_o can_v plain_o see_v after_o the_o ordinary_a manner_n only_o when_o the_o air_n be_v let_v in_o again_o there_o seem_v to_o be_v some_o little_a and_o but_o very_o little_a rise_v at_o least_o in_o one_o of_o the_o pipe_n in_o this_o trial_n this_o phaenomenon_n be_v note_v that_o though_o there_o appear_v no_o bubble_n at_o all_o in_o the_o vesseled_a spirit_n of_o wine_n notwithstanding_o that_o we_o continue_v to_o pump_v yet_o there_o do_v for_o a_o pretty_a while_n arise_v bubble_n in_o that_o part_n of_o the_o liquor_n that_o be_v get_v into_o the_o slender_a pipe_n which_o i_o guess_v to_o proceed_v from_o the_o sustentation_n in_o part_n of_o the_o spirit_n of_o wine_n make_v by_o the_o inside_n of_o the_o pipe_n whereto_o it_o adhere_v experiment_n xxviii_o about_o the_o great_a and_o seem_o spontaneous_a ascension_n of_o water_n in_o a_o pipe_n fill_v with_o a_o compact_a body_n who_o particle_n be_v think_v incapable_a of_o imbibe_v it_o upon_o occasion_n of_o the_o seem_o spontaneous_a ascension_n of_o water_n in_o slender_a pipe_n of_o glass_n i_o consider_v that_o it_o will_v be_v easy_a by_o another_o way_n to_o make_v it_o rise_v to_o a_o far_o great_a height_n than_o hitherto_o have_v be_v do_v for_o since_o we_o have_v find_v by_o observation_n